The problem with the f30 it looks as sporty as a Camry. The sport pack e90 on 162's especially in titanium silver was imo one of the coolest/sportiest looking sedan when it came out.
When i saw the f30 for the first time,i was disappointed i hate to admit it,it might drive nice but the Audi looks much much better. The f10 looks great but drives like a 7 series.
People want a car that handles great but also looks great. Looks is actually more important to most buyers. The f10 is one of the worst handling 5 but probably the most selling,mainly because it looks great in my opinion.